Top Tank :
This tank has a 1.87 diameter hose connection
Bottom Tank :
This tank has a 1.87″ diameter hose connection
1/4″” NPT flange for a drain cock
Two holes @ 11.50″” centers for an oil cooler
1/2″” diameter connection at the end of the tank for an expansion tube
3/4″” diameter bypass hose coming out of the fan side of the tank
Note: this tank is similar